PCM Going out?

Hey guys (gals). New member here but long time Mustang owner.

I have a 2000 GT with the stock 4.6 2v. I have a list of mods but I recently installed Modular Head Shop stage two cams. I have a SCT tuner with online Bama tunes. I have to say, Im not very pleased with their tuning abilities BUT....I have issued that make me think its either their tunes or my PCM going on the fritz.

My question is, are there "new" PCMs for 99-04 cars? Or can I send mine in somewhere to be tested/refurbished?

I’ll try to make a long story short. This is my old high school car. I found it 12 years later and it remained 99% the same since I sold it. (Other than being small fender benders and pretty much every corner of the cAr now having something wrong with it).
I had a list of modifications done to it from when I had it before. Including a bank SCT chip with dial selector. I had 3 tunes: 87,93 and 93 with nitrous.
When I bought the car back about a year ago, the chip was still installed. It ran mostly “ok” other than a few weird quirks. Mainly egr codes and some weird chugging when coasting down or under very light throttle. I removed the chip and it ran “better” but still not perfect. I did a full tune up and got it running pretty good but eventually developed a problem idling. Honestly can’t remember if this problem started before or after I got the SCT X4 unit. I had a tune on it via the X4 before I did the cams. But ever since I did the cams, it obviously amplified the idling problem. Under throttle and WOT, it runs pretty dang good. And overall runs pretty good. Main concern is the idling.

sorry for the novel but I’m basically askingif anyone has replaced their pcm and how common a problem it is? And how can I verify the pcm being an issue?

Do PCMs just "go out"? Or do they slowly go out and certain circuits start slowing failing? I have some weird issues with the drivability of my car but theres no error codes and its so inconsistent that Its hard to replicate to properly diagnose.

92j3ieje8 said:

Theres some for like 30$ that'll work. I could sell u one.

Click to expand...

I'll send you a PM